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Evaluating Tight Oil and Gas Reservoirs

This four or five day class provides an extensive introduction to the exploration, appraisal, and development of tight oil and gas reservoirs. It identifies the data that need to be collected, how to analyze and interpret them, and how to integrate and apply this knowledge to the decision‐making process. Participants will develop a broad understanding of the practices and pitfalls in assessing these reservoirs, and will reinforce this knowledge by analyzing case study posters as teams. Attendees will receive a course notebook and 4 GBs of reference material. While not a prerequisite, it is recommended that this course be taken prior to R&A’s “Unconventional Resource Assessment and Valuation” course.

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Course Description (PDF)

Who Should Attend: This course is intended for geoscientists, petrophysicists, engineers, and managers who are
seeking a comprehensive introduction to these reservoirs. It is appropriate for those with no
previous experience in these reservoirs, those that have some experience and want to
broaden their understanding, and more experienced hands that want exposure to some of
the most recent technologies and practices.
What Participants Are Saying: “Extremely wide ranging information summarized in a concise manner””Great. Lots of excellent resources/references provided.”
“Course was an excellent introduction to unconventional resource plays for the uninitiated.”

Course Content

  1. Introduction: Definitions, technologies, global potential, commercial aspects, reserves
  2. Gas shales and liquids‐rich shales (Two to three days)
    1. Geology: Origin, composition, deposition, pore types, natural fractures
    2. Geochemistry: TOC, Rock-Eval, thermal maturity, sorption, liquids to gas transition
    3. Geophysics: Geohazards, seismic attributes, micro-seismic, geomodeling
    4. Petrophysics: Core analyses, log analyses, integration, practices and pitfalls
    5. Geomechanics: Static & dynamic properties, stress calculations, frac stim design
    6. Drilling/Completions: Drilling practices, completion types, refracs, simul-fracs
    7. Well Performance: Well testing, flow regimes, forecasting, condensate blockage
    8. Shale Gas Case Studies: Fayetteville, Haynesville, Montney, Horn River
    9. Liquids-Rich Shale Case Studies: Eagle Ford, Marcellus, Woodford, Barnett
    10. Sweet-spotting: Data to collect/integrate, strategies, decision trees, exit ramps
  3. Tight sandstones and carbonates (One to two days)
    1. Depositional systems, diagenesis, stratigraphy, correlation, res. quality
    2. Geophysics: Resolving geo-bodies, fractures, poroperms with 3D seismic & VSPs
    3. Petrophysics: Routine and special core analyses, log analyses, field examples
    4. Drilling and Completions: Best practices, problems, technologies and limitations
    5. Well Performance: Well testing, material balance, modeling, rate vs. time relations
    6. Discrete vs. basin-centered accumulations: Characteristics, differentiating them
    7. TS Case Studies: Jonah, Wamsutter, Wattenberg, Chiswick Fields; Medina, Hamra
    8. TC Case Studies: Bakken, Niobrara, Austin Chalk, Jean Marie, Kharaib B, Baturaja
    9. Identifying Sweetspots: Key data to collect/analyze, success criteria, and exit ramps
  4. Coal seam gas (A half-day to a full day)
    1. Deposition, coalification, fractures, hydrology, lab/log analyses, undersaturation, well performance, drilling/completions, appraisal and development strategies
    2. Case studies: South Shale Ridge, Spanish Peaks, Drunkard’s Wash, Castlegate fields